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In this paper, we investigate resource allocation for decode-and-forward (DF) opportunistic cooperative networks, where the availability of the direct link between the source and the destination has been taken into consideration. In addition to separate power allocation and location optimization, we also consider joint resource allocation to minimize the outage probability. Under Rayleigh fading channels, the closed-form solution is derived for both separate and joint resource optimizations. Numerical results show that the proposed optimized systems outperform the unoptimized ones, and the minimum outage probability can be achieved by joint power-location optimization.